ML20207K325
| ML20207K325 | |
| Person / Time | |
|---|---|
| Site: | Trojan File:Portland General Electric icon.png |
| Issue date: | 11/18/1977 |
| From: | Klingler G, Sniezek J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-77-206, NUDOCS 9903170133 | |
| Download: ML20207K325 (1) | |
Text
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p{ ~ l G% G J(My "El.I!'11/,T:V NOTir! CATION n-November 18, 1977 PP,ELIMINARY NOTIFICATION OF EVENT OR UNUSUAL OCCURRENCE--PN i
This areliminary notification constitutes EARLY notice of an event of 2
POSSI3LE safety or_ public interest significance.
The information presented is as initially received without_ verification or evaluation 3
.and is basically all that is known by IE staff on this date.
Facility: Portland General Electric Company Trojan Nuclear Power Plant, Rainier, Oregon Docket No. 50-344 i
T
Subject:
DISCOVERY OF THROUGH-WALL CRACK IN 2-INCH PIPE IN CONTAINMENT BUILDING The licensee reported by telephone the discovery oA November 17,1977 of
.an approximately 1/8 inch throughwall crack in the reactor letdown piping system.
tainment building.The discovery was made'during an entry into the con-The reactor letdown system was switched to an alternate letdown path an the normal letdown path was secured, thus isolating the section of pipe which contains the crack.
The licensee is formulating plans to repair the cracked section of pipe. The Troja the occurrence. n Plant continued to operate at full power throughout There was no relea of the occurrence.se of radioactivity to the environment as a result MM The reactor letdown system is used to. remove'a small*' flow'(approxim 75 gallons per minute) of water from the reactor cooling system to control of the reactor coolant. compensate for water added by pump seal l normal operation is pressurized to approximate The licensee plans to include a discussion of this occurrence in its media each Monday. weekly operating press release which is available NRC Region V (San Francisco) received initial notification of this N
fEh3:15p.m.onhovemberoccurrence by telephone from the Plant Superintendent a 2
17, 1977.
-a n C {
';8;; s
Contact:
GKlingler, IE x28019 JSniezek, IE x28019 y p 7 3 Distribution:
Transmitted H St'Il6 b
/.o eo Chairman Hendrie d Comissioner Kennedy Com'ssioner Bradford S. J. Chilk, SECY
- Comissioner Gilinsky C. C. Kamerer, CA
" Transmitted: MNBB (48,0')
PBldgY!O4 (ForDistribution) n S
J. J. Fouchard, PA SS Bldg b O (MAIL)
R. Hartfield, MIPC R. G. Ryan, OSP C. V. Smith, NMSS R. J. McTiernan, 0IA H. K. Shapar, ELD R. Minogue, SD yg PRELIMINARY NOTIFICATION